Thermal coupled photocatalysis over Pt/g-C3N4 for selectively reducing CO2 to CH4 via cooperation of the electronic metal–support interaction effect and the oxidation state of Pt

Ning Sun; Yixin Zhu; Mengwei Li; Jun Zhang; Jiani Qin; Yingxuan Li; Chuanyi Wang

doi:10.1016/j.apcatb.2021.120565

Thermal coupled photocatalysis over Pt/g-C₃N₄ for selectively reducing CO₂ to CH₄ via cooperation of the electronic metal–support interaction effect and the oxidation state of Pt

Ning Sun, Yixin Zhu, Mengwei Li, Jun Zhang, Jiani Qin, Yingxuan Li, Chuanyi Wang

Research output: Contribution to journal › Article › peer-review

91 Scopus citations

Abstract

Pt nanoparticle-loaded g-C₃N₄ (Pt/CN) that consisted of integrating Pt⁰ and Pt²⁺ species was prepared for selectively reducing CO₂ to CH₄ with H₂O by thermal coupled photocatalysis. A strong electronic metal-support interaction was constructed between Pt nanoparticles and the g-C₃N₄ substrate, which limited the activity for CO evolution and improved the charge transfer from g-C₃N₄ to Pt for selective CH₄ production. The formed Pt²⁺ species in the Pt nanoparticles completely suppress the side reaction of H₂ production from reducing H₂O. Moreover, a moderate heat input in the photocatalytic reaction facilitated the transfer of the photogenerated electrons from Pt nanoparticles to CO₂, which further increased the photocatalytic activity for CH₄ evolution. As a result, a significant enhancement of CO₂ methanation performance (∼100 % selectivity, 14.8 μmol g⁻¹ h⁻¹) was realized on a 2 % Pt-loaded g-C₃N₄ photocatalyst under low intensity light-emitting diode (420 nm, on the order of solar intensity) irradiation at 125 °C.

Original language	English
Article number	120565
Journal	Applied Catalysis B: Environmental
Volume	298
DOIs	https://doi.org/10.1016/j.apcatb.2021.120565
State	Published - 5 Dec 2021
Externally published	Yes

Keywords

CH selectivity
CO photoreduction
Electronic metal-support interaction
Pt nanoparticles
g-CN

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apcatb.2021.120565

Cite this

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title = "Thermal coupled photocatalysis over Pt/g-C3N4 for selectively reducing CO2 to CH4 via cooperation of the electronic metal–support interaction effect and the oxidation state of Pt",

abstract = "Pt nanoparticle-loaded g-C3N4 (Pt/CN) that consisted of integrating Pt0 and Pt2+ species was prepared for selectively reducing CO2 to CH4 with H2O by thermal coupled photocatalysis. A strong electronic metal-support interaction was constructed between Pt nanoparticles and the g-C3N4 substrate, which limited the activity for CO evolution and improved the charge transfer from g-C3N4 to Pt for selective CH4 production. The formed Pt2+ species in the Pt nanoparticles completely suppress the side reaction of H2 production from reducing H2O. Moreover, a moderate heat input in the photocatalytic reaction facilitated the transfer of the photogenerated electrons from Pt nanoparticles to CO2, which further increased the photocatalytic activity for CH4 evolution. As a result, a significant enhancement of CO2 methanation performance (∼100 % selectivity, 14.8 μmol g−1 h−1) was realized on a 2 % Pt-loaded g-C3N4 photocatalyst under low intensity light-emitting diode (420 nm, on the order of solar intensity) irradiation at 125 °C.",

keywords = "CH selectivity, CO photoreduction, Electronic metal-support interaction, Pt nanoparticles, g-CN",

author = "Ning Sun and Yixin Zhu and Mengwei Li and Jun Zhang and Jiani Qin and Yingxuan Li and Chuanyi Wang",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = dec,

day = "5",

doi = "10.1016/j.apcatb.2021.120565",

language = "English",

volume = "298",

journal = "Applied Catalysis B: Environmental",

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T1 - Thermal coupled photocatalysis over Pt/g-C3N4 for selectively reducing CO2 to CH4 via cooperation of the electronic metal–support interaction effect and the oxidation state of Pt

AU - Sun, Ning

AU - Zhu, Yixin

AU - Li, Mengwei

AU - Zhang, Jun

AU - Qin, Jiani

AU - Li, Yingxuan

AU - Wang, Chuanyi

PY - 2021/12/5

Y1 - 2021/12/5

N2 - Pt nanoparticle-loaded g-C3N4 (Pt/CN) that consisted of integrating Pt0 and Pt2+ species was prepared for selectively reducing CO2 to CH4 with H2O by thermal coupled photocatalysis. A strong electronic metal-support interaction was constructed between Pt nanoparticles and the g-C3N4 substrate, which limited the activity for CO evolution and improved the charge transfer from g-C3N4 to Pt for selective CH4 production. The formed Pt2+ species in the Pt nanoparticles completely suppress the side reaction of H2 production from reducing H2O. Moreover, a moderate heat input in the photocatalytic reaction facilitated the transfer of the photogenerated electrons from Pt nanoparticles to CO2, which further increased the photocatalytic activity for CH4 evolution. As a result, a significant enhancement of CO2 methanation performance (∼100 % selectivity, 14.8 μmol g−1 h−1) was realized on a 2 % Pt-loaded g-C3N4 photocatalyst under low intensity light-emitting diode (420 nm, on the order of solar intensity) irradiation at 125 °C.

AB - Pt nanoparticle-loaded g-C3N4 (Pt/CN) that consisted of integrating Pt0 and Pt2+ species was prepared for selectively reducing CO2 to CH4 with H2O by thermal coupled photocatalysis. A strong electronic metal-support interaction was constructed between Pt nanoparticles and the g-C3N4 substrate, which limited the activity for CO evolution and improved the charge transfer from g-C3N4 to Pt for selective CH4 production. The formed Pt2+ species in the Pt nanoparticles completely suppress the side reaction of H2 production from reducing H2O. Moreover, a moderate heat input in the photocatalytic reaction facilitated the transfer of the photogenerated electrons from Pt nanoparticles to CO2, which further increased the photocatalytic activity for CH4 evolution. As a result, a significant enhancement of CO2 methanation performance (∼100 % selectivity, 14.8 μmol g−1 h−1) was realized on a 2 % Pt-loaded g-C3N4 photocatalyst under low intensity light-emitting diode (420 nm, on the order of solar intensity) irradiation at 125 °C.

KW - CH selectivity

KW - CO photoreduction

KW - Electronic metal-support interaction

KW - Pt nanoparticles

KW - g-CN

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